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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Buletin Agrohorti Jurnal Ilmu Pertanian Indonesia Jurnal Ilmu Tanah dan Lingkungan (Journal of Soil Science and Environment) Jurnal Ilmu Pertanian Agroland : Jurnal Ilmu-Ilmu Pertanian Jurnal Lahan Suboptimal Jurnal Hortikultura Jurnal Konstruksia AGRIVITA, Journal of Agricultural Science Kultivasi Jurnal Sains Teh dan Kina Jurnal Penelitian Pertanian Tanaman Pangan Rancang Bangun Journal of Tropical Crop Science jurnal Ilmu Pertanian (Agricultural Science) Al-Awqaf: Jurnal Wakaf dan Ekonomi Islam Media Pertanian Mabsya: Jurnal Manajemen Bisnis Syariah Jurnal Agronomika Jurnal Ilmiah Teknik Sipil (JIMATS)

Dwi Guntoro

Departemen Agronomi Dan Hortikultura, Fakultas Pertanian, IPB University, Kampus IPB Darmaga, Bogor 16680

Author-ID : 271099

Religion Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences Transportation

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Potensi Pemanfaatan Material Kapur Dari Kabupaten Sorong Selatan Sebagai Bahan Stabilisasi Tanah Lempung Pada Ruas Jalan Di Kabupaten Sorong Rusdi, Achmad; Sikowati, Dwi Guntoro
Jurnal Teknik Sipil : Rancang Bangun Vol 4, No 2 (2018): Oktober
Publisher : Universitas Muhammadiyah Sorong

Menurut hasil survey Direktorat Investigasi Sumber Daya Mineral disebutkan bahwa potensi bahan galian batu kapur di Kabupaten Sorong Selatan mempunyai sumber daya hipotetik sebesar 375.000.000 m3. Disisi lain, kondisi umum jaringan jalan di Kabupaten Sorong beberapa tahun terakhir terus mengalami penurunan. Data dari BPS Kabupaten Sorong menunjukkan bahwa 50% rusak sampai rusak berat; 27,65% rusak sedang serta hanya 21,5% dalam kondisi baik. Yang menjadi sorotan juga pada beberapa ruas adalah terkait daya dukung tanah dasar (sub-base), yang mana pada daerah tersebut mempunyai tanah dasar lempung. Tujuan penelitian ini adalah untuk mengidentifikasi pengaruh penambahan kapur dari Kabupaten Sorong Selatan pada tanah lempung di ruas jalan Kabupaten Sorong terhadap kekuatan daya dukung tanahnya. Dan yang kedua adalah untuk mengidentifikasi kelayakan penambahan kapur dari Kabupaten Sorong Selatan dalam menstabilisasi tanah lempung di ruas jalan Distrik Mariat Kabupaten Sorong. Penelitian ini merupakan penelitian yang dilakukan di laboratorium. Penelitian yang menggunakan jenis material tanah lempung dari Distrik Mariat. Sampel tanah yang diambil akan dicampur kapur untuk kemudian diketahui karakteristik daya dukungnya berdasarkan uji CBR. Pengujian CBR akan di lakukan di Laboratorium Mekanika TanahÂ Teknik Sipil Universitas Muhammadiyah Sorong. Hasil dari penelitian ini menunjukkan bahwa penambahan kapur pada tanah lempung mampu menaikkan nilai CBR dari yang semula 46,48% menjadi 48% pada penambahan 6% kapur. Namun sebaliknya pada penambahan kapur diatas 6% justru mengalami penurunan nilai CBR. Hasil ini juga menunjukkan material kapur yang berasal Kabupaten Sorong Selatan dapat dijadikan sebagai bahan stabilisasi tanah lempung di ruas jalan Kabupaten Sorong dengan persentase penambahan kapur sebesar 6%.

The Role of Biomulch Arachis pintoi In Increasing Soil Infiltration Rate on Sloping Land of Oil Palm Plantation Sarjono, Arif; Guntoro, Dwi; Supijatno, Supijatno
Journal of Tropical Crop Science Vol 5 No 3 (2018): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

The slope of land in oil palm plantation areas is the one of the primary causes of low soil water content due to low rates of soil infiltration. Biomulch is one of the conservation methods that can be used to cover and shield the soil from weeds, prevent soil erosion, and increase the rate of soil infiltration. Arachis pintoi is a perennial, stoloniferous legume crop that has potentials to be used as biomulch. The objective of the research was to study the role of Arachis pintoi in increasing the rate of soil infiltration on a sloping land of oil palm plantation. The research was conducted on the slope land (22.8%) of the Bukit Kemuning Farmer Group, Mersam, Batanghari, Jambi, Indonesia (01036'21", 102057'11") from September 2017 to March 2018. The environmental design used in this study was a one-factor randomized block design (RBD) with five ground cover treatments, i.e. natural vegetation, Arachis pintoi, Centrosema pubescens, Pueraria javanica and Calopogonium mucunoides. The results showed that the average growth rate of A. pintoi was 2.47 cm per week, which was lower than the growth of other treatments. The root length of A. pintoi was 50.36 cm at 20 weeks after planting. A. pintoi can be used as biomulch; sloping land planted with A. pintoi had an infiltration rate of 49.30 cm per hour at 20 week after planting, i.e. an increase of 32.47% compared to the infiltration rate with the natural vegetation.Keywords: land cover crop, Centrosema pubescens, Pueraria javanica, Calopogonium mucunoides

Weed Growth and Lowland Rice Production as Affected by Planting Patterns and Rice Varieties Rianto, Dwi Fajar; Guntoro, Dwi; Santosa, Edi
Journal of Tropical Crop Science Vol 6 No 01 (2019): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Weeds are one of the most limiting factors in rice cultivation. This study aims to evaluate the eff ects of rice planting patterns on the prevalence of several weed species, Cyperus iria, Echinochloa crusgalli, Fimbristylis miliacea, Leptochloa chinensis, Ludwigia octovalvis, and Spenoclea zeylanica, and to discuss the implications on rice production systems. The research was conducted in IPB Sawah Baru experimental farm in Bogor, West Java, Indonesia, from December 2017 to April 2018. The experiment was arranged in a randomized block design with two factors, rice varieties and rice planting methods. The rice varieties, “IPB 3S” and “Ciherang”, were assigned as the main plot, whereas planting methods, i.e. 25x25 tile, Legowo 2:1 (double rows), Legowo 4:1 (quadruple rows), as sub-plots. The results showed that in the “IPB 3S” plots L. octovalvis shoot dry weight decreased by 33.0%, the root dry weight of L. chinensis roots decreased by 22.6%, and the number of S. zeylanica weed leaves decreased by 28.4% compared to the plots planted with “Ciherang”. With legowo 2:1 planting method the dry weights of L. octovalvis decreased by 21.5%, L. octovalvis by 1.7%, and L. chinensis by 4.4%, and the number of weeds E. crus-galli by 7.0 % compared to Tegel 25x25 method. L. chinensis seemed to be a dominant weed at both vegetative and generative stage of rice development.

Identifikasi Senyawa Metabolit Ekstrak Akar Padi dan Potensi Alelopati terhadap Gulma Echinochloa crus-galli dan Monochoria vaginalis Sujinah, Sujinah; Guntoro, Dwi; Sugiyanta, Sugiyanta
Jurnal Penelitian Pertanian Tanaman Pangan Vol 5, No 2 (2021): Agustus 2021
Publisher : Pusat Penelitian dan Pengembangan Tanaman Pangan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jpptp.v5n2.2021.p98-106

Allelopathy plays an important role in weed control because it reduces dependence use on synthetic herbicide and labor. Some rice varieties release chemical compounds that can inhibit weed growth. The objective of this research was to identify compounds and to determine the rice allelopathic potential of rice root extract. The experiment was conducted in Regional Health Laboratorium Jakarta and ICRRâ€™s greenhouse, West Java. Identification of metabolite compounds in 10 rice root extracts used GCMS. The experiment in the greenhouse used a split plot design with four replications. The main plot was weeds (Echinochloa crus-galli and Monochoria vaginalis), while the subplot was the roots of 10 swamp rice varieties and control. The rice roots were extracted by the maceration method using 80% methanol and evaporated by a rotary evaporator. The root extract was diluted distilled water at a 50% concentration (w/v) and applied to weeds. The experimental unit was 3 pots planted with 5 weed seeds. The research identified 88 compounds in rice root extract and the highest peak area was stigmasterol compound. The inhibitory of growth and dry weight of weeds varied, between 27-44%. Inpara-3, Inpara-4, Inpara-7, Inpara-8, and Inpara-10 were able to inhibit weeds greater and belong to one cluster. The five swamp rice can be chosen to be developed in paddy fields that were dominated by Echinochloa crus-galli and Monochoria vaginalis.

Residu Pestisida Organofosfat Pada Beras dan Perilaku Petani dalam Penggunaan Pestisida di Kabupaten Subang, Jawa Barat Harisman, Muhammad Ikhsan; Abidin, Zaenal; Guntoro, Dwi
Jurnal Penelitian Pertanian Tanaman Pangan Vol 5, No 2 (2021): Agustus 2021
Publisher : Pusat Penelitian dan Pengembangan Tanaman Pangan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jpptp.v5n2.2021.p107-115

Organophosphate pesticides are widely used in agriculture asthey are the most toxic insecticides against vertebrates and easily biodegradable in nature. The objective of this study was to determine the organophosphate residue in rice from several rice varieties and behaviors of farmers in using pesticides. The study was conducted in Subang Regency, West Java, from May to June 2020 using a gas chromatography analysis method. The rice samples came from three sub-districts of Subang Regency, namely Ciasem, Purwadadi, and Sagalaherang in Subang Regency. The data collection of farmer behavior in the used of pesticides in rice farming were conducted by purposive sampling using questionnaires and interviews. The results showed that the residual contents of the organophosphate active ingredients(diazinon, chlorpyrifos, and fenitrotion) in Ciherang, Inpari-32 HDB, and IR64 rice varietes were significantly lower than the Maximum Residue Limits (BMR) of each pesticides allowed in agriculture based on the Indonesian National Standard (SNI) 7313: 2008, so it is safe for consumption. The low residue of organophosphate pesticides is related to the behavior of farmers in using pesticides which generally refers to recommendations and most farmers use pesticides according to the concept of integrated pest control, namely the right dose, right time, right type, and right target according to the type of pests and plant diseases.

Perbedaan Kebutuhan Nitrogen untuk Produksi Kedelai di Tanah Mineral dan Mineral Bergambut Dengan Budidaya Jenuh Air -, Bachtiar; Ghulamahdi, Munif; Melati, Maya; Guntoro, Dwi; Sutandi, Atang
Jurnal Penelitian Pertanian Tanaman Pangan Vol 35, No 3 (2016): Desember 2016
Publisher : Pusat Penelitian dan Pengembangan Tanaman Pangan

Development of soybean (Glycine max (L) Merr.) in tidal land are faced with problems physical, chemical and biological soil properties, such as high organic matter, high soil acidity, toxicity of Fe and Al, and deficiency of nutrients N, P , K, Ca and Mg. N content is high (> 0.51%) but with low availability.Â The research objective is to determine the dose and timing of N, P and K application in accordance with the needs of soybean plants to have optimally growth and production in mineral and peaty mineral soil in tidal land. The research was conducted in mineral and peaty mineral soil of tidal land type C and B, District of Tanjung Lago, Banyuasin Regency, Province of South Sumatra from April to August 2014. The model is linear using split plots in a randomized block design. Varieties of Willis and Tanggamus were used for nitrogen application experiment.Â The time of fertilizer application is at 2, 3 and 4 weeks after planting (WAP), 2, 3, 4 and 5 WAP, and 2, 3, 4, 5 and 6 WAP. The concentration of nitrogen is 7,5; 10; 12,5 and 15 g/l water with spraying volume of 400 l/ha.Â In the mineral soil, dry weight of nodules and Willis biomass increased with increasing frequency time of fertilization, otherwise Tanggamus more fluctuating and declined at higher frequency of fertilization. Wilis variety generating the highest production of 3,5 ton/ha.Â In the peaty mineral soil, dry weight of nodules and biomass were not significant.Â Willis productivity tends to decrease with increasing nitrogen concentrations.Â Tanggamus productivity tends to increase with increasing nitrogen concentration at all level of time fertilization.Â Tanggamus tend to generate higher productivity of 3,2 ton/ha.

Penggunaan Herbisida untuk Pengendalian Gulma pada Budi Daya Kedelai Jenuh Air di Lahan Pasang Surut Perkasa, Achmad Yozar; Ghulamahdi, Munif; Guntoro, Dwi
Jurnal Penelitian Pertanian Tanaman Pangan Vol 35, No 1 (2016): April 2016
Publisher : Pusat Penelitian dan Pengembangan Tanaman Pangan

Weed is a problem on the soybean saturated culture in tidal swamp land. The objective of this study was to obtain the most effective herbicide for weed control on soybean planted under saturated culture in the tidal swamp land. Research was conducted in tidal swamp land at Banyu Urip village, Tanjung Lago districs, Banyuasin, South Sumatra Province, from July to December 2013, using a randomized block design consisted, of the eight treatments, with three replications. The treatments were: control (P0), manual weeding 4 weeks after planting (P1), paraquat 2 l/ha 4 weeks after planting (P2), glyphosate 3 l/ha 4 after planting (P3), oxyfluorfen 2 l/ha 3 days before planting (P4), oxyfluorfen 3 days before planting 2 l/ha followed application of paraquat 4 weeks after planting 2 l/ha (P5), oxyfluorfen 3 days before planting 2 l/ha followed application of glyphosate 4 weeks after planting 3 l/ha (P6), penoxulam 1 l/ha 2 weeks after planting (P7). Results showed that herbicide paraquat effectively suppressed total dry weight of weeds at 4, 6, and 8 weeks after planting. Cyperus iria was the most dominant weed in the field, with Sum Dominance Ratio 37.7%. The highest soybean productivity was 3.7 t/ha obtained from glyphosate treatment. Pre-emergence herbicide applications should be done prior to soybean planting and the post-emergence herbicide application must be done carefully by using nozzle lid to prevent toxicity to the crop plants.

Aktivitas Herbisida Campuran Bahan Aktif Cyhalofop-Butyl dan Penoxsulam terhadap Beberapa Jenis Gulma Padi Sawah Dwi Guntoro; Trisnani Yuda Fitri
Buletin Agrohorti Vol. 1 No. 1 (2013): Januari 2013
Publisher : Departemen Agronomi dan Hortikultura

Weed competition becomes a major problem in low land rice. Weeds can reduce rice production up to 60-70%. Mixing herbicides is expected to obtain a broader spectrum of control of the weeds. Inappropriate mixing herbicides may cause antagonism effect which can reduce the effectiveness on the target weed. The objective of the research was to study the antagonism activity of two active ingredients herbicide mixture, cyhalofop-butyl and penoxulam. The treatment was consisted of three types of herbicide with five level of doses, i.e. a single herbicide cyhalofop-butyl (0, 375, 750, 1500, and 3000 g ai ha-1), penoxulam (0, 50, 100, 200, and 400 g ai ha-1), and the mixture of cyhalofop- butyl 50 g L-1+ penoxulam 10 g L-1(0, 225, 450, 900, and 1800 g ai ha-1). The target weeds were Echinochloa cruss-galliand Monochoria vaginalis. Dry weight of biomass and percent of damage would further determine wheather the herbicide mixture were synergistic, antagonistic, or additive. Since cyhalofop-butyl and penoxulam had a different mode of action, analysis of the data used MSM (Multiplicative Survival Model) method to determine the LD50 of each herbicide treatment and mixture component. The result showed that an active ingredient mixture of cyhalofop-butyl 50 g L-1+ penoxulam 10 g L-1 was not antagonist, with LD50-expectation values of 253.231 g ai ha-1and the LD50-treatment of 211.91 g ai ha-1. The co-toxicity value was 1.19 (>1).Key words: rice field weeds, cyhalofop-butyl, penoxulam, herbicide mixture, MSM (Multiplicative Survival Model), LD50

Pengendalian Gulma pada Tanaman Padi Sawah dengan Menggunakan Herbisida Berbahan Aktif Campuran Bentazon dan MCPA Seken Polansky; Dwi Guntoro
Buletin Agrohorti Vol. 4 No. 1 (2016): Buletin Agrohorti
Publisher : Departemen Agronomi dan Hortikultura

Gulma merupakan salah satu kendala utama dalam produksi padi sawah. Penelitian ini bertujuan untuk mengetahui efektivitas herbisida berbahan aktif campuran bentazon dan MCPA untuk mengendalikan gulma padi sawah. Percobaan dilaksanakan di Desa Bojong Jengkol, Kecamatan Ciampea, Kabupaten Bogor, Jawa Barat dari September 2012 hingga Januari 2013. Percobaan menggunakan Rancangan Acak Kelompok satu faktor dengan tujuh perlakuan dan empat ulangan. Percobaan terdiri atas 5 perlakuan herbisida berbahan aktif bentazon dan MCPA yaitu dosis 1.00 L ha-1, 1.50 L ha-1, 2.00 L ha-1, 2.50 L ha-1, 3.00 L ha-1; pengendalian gulma manual dan tanpa pengendalian gulma (kontrol). Hasil menunjukkan aplikasi herbisida berbahan aktif campuran bentazon dan MCPA dapat mengendalikan gulma dari golongan teki dan gulma daun lebar. Spesies gulma yang terkendalikan dari golongan teki adalah Fimbristylis miliacea dan Cyperus iria, sedangkan dari golongan daun lebar adalah Ludwigia octovalvis, Alternanthera philoxeroides, dan Portulaca oleracea. Aplikasi herbisida pada semua dosis uji menunjukkan toksisitas rendah pada tanaman padi. Aplikasi herbisida berbahan aktif Bentazon dan MCPA pada semua dosis uji menurunkan persentase gabah hampa sebesar 6-10% serta dapat meningkatkan produktivitas padi sebesar 48.6% yang tidak berbeda dengan produktivitas padi pada pengendalian manual.

Kualitas Visual dan Fungsional Turfgrass pada Beberapa Waktu Awal dan Frekuensi Aplikasi Pupuk Hayati . Yusak; Dwi Guntoro; Achmad Zakaria
Buletin Agrohorti Vol. 3 No. 2 (2015): Buletin Agrohorti
Publisher : Departemen Agronomi dan Hortikultura

Pemberian pupuk anorganik dengan dosis dan frekuensi yang relatif tinggi banyak dilakukan untuk mempertahankan kualitas, densitas, dan keseragaman rumput golf, tetapi dapat mengakibatkan pencemaran tanah dan perairan. Penggunaan pupuk hayati diharapkan dapat mengurangi penggunaan pupuk anorganik. Penelitian bertujuan untuk mempelajari pengaruh waktu awal dan frekuensi aplikasi pupuk hayati terhadap kualitas visual dan fungsional turfgrass. Penelitian dilaksanakan di lapangan Golf Bukit Pelangi, Cijayanti, Bogor mulai bulan Februari sampai Agustus 2012. Percobaan menggunakan Rancangan Split Plot dalam RKLT dengan 2 faktor yaitu waktu awal aplikasi dan frekuensi aplikasi pupuk hayati dengan 4 ulangan. Waktu awal aplikasi sebagai petak utama terdiri atas empat taraf, yaitu 1, 2, 3, dan 4 minggu sebelum tanam. Frekuensi aplikasi pupuk hayati sebagai anak petak terdiri atas 4 taraf, yaitu frekuensi 1, 2, 3 dan 4 minggu sekali. Hasil percobaan menunjukkan bahwa frekuensi aplikasi satu minggu sekali menunjukkan kualitas visual dan fungsional terbaik dan tidak berbeda nyata dibandingkan frekuensi aplikasi dua minggu sekali. Waktu awal aplikasi tiga minggu sebelum tanam dan frekuensi aplikasi dua minggu sekali merupakan perlakuan terbaik untuk mempertahankan kualitas visual dan fungsional turfgrass, yaitu meningkatkan kepadatan pucuk, lebar daun, warna daun, panjang daun, biomassa pangkasan, persentase penutupan tajuk, meningkatkan panjang akar, biomassa akar, mempercepat waktu recovery, dan menurunkan diameter stolon.

Co-Authors , Erinnovita , Purwono , Sarwono ,, Usman ,, Yuniarti -, Bachtiar . Yusak Abdul Harris Burhan Achmad Yozar Perkasa, Achmad Yozar Achmad Zakaria Achmad Zakaria Ade Sumiahadi Ade Sumiahadi, Ade Adolf Pieter Lontoh, Adolf Pieter AHMAD JUNAEDI Alghifari, Ahmad Fadli Anas Dinurrohman Susila Andreas Kefi Andriyani, Yuni Ani Kurniawati Anung Wahyudi Asrul Saputra Atang Sutandi Bachtiar Bachtiar Bambang S. Purwoko Bambang Sapta Purwoko Bilkis, Faras Gaitsa BUDI TJAHJONO Bukhori, Anwar Desembardi, Faried Desyandri Desyandri Dewi, Sangrani Annisa Dini Dwirestina Dita Nurul Latifah Dulbari, Dulbari Durotun Nafisa Dwiwanti Sulistyowati Dwiwanti Sulistyowati Edi Santosa Eko Sulistyono Eny Widajati Evar, Fitrawaty Orista Fahrul Rozy Pohan Faqih Udin Faried Desembardi Ferdinans, Ferdinans Fredinan Yulianda Harisman, Muhammad Ikhsan Hariyadi Herdhata Agusta Heri Syahrian Iqbal Iqbal Irawan, Riko Irdika Mansur Irianto, M. Yuli Jafarudin, Ahmad Januar Kanny, Putri Irene Kansa Dianti Putri Karlin Agustina Khalida, Rahmi Kukuh Nugraha Kusuma, Ayu Vandira Candra Luh Putu Ratna Sundari M A Chozin M. Khais Prayoga M.A. Chozin Mahfudz Mahfudz Manalu, Pinondang Maryati Sari Maya Melati Maya Melati Mia Audina, Mia Muhamad Achmad Chozin Muhamad Achmad Chozin Muhamad Ahmad Chozin Muhamad Syukur Muhammad Ahmad Chozin Muhammad Ridwan Muhammad Rusmin Muhammad Syukur Munif Ghulamahdi Muntoyib, Junaidi Murtilaksono, dan Kukuh Mutaqin, Enjen Zaenal Neshi Claudia Ramadhanti Norul Dewi Susanti Oktavian, Aldi Pasaribu, Pesta Maria Hotnauli Polansky, Seken Rianto, Dwi Fajar Rizqullah, Ramadaniarto Roudho, Zahrotur Rusdi, Achmad Sari, Indah Fatika Sarjono, Arif Sarjono, Arif Seken Polansky Simangunsong, Yosua Pratama Sinaga, Intan Lorenza Sintho Wahyuning Ardie SOEKISMAN TJITROSEMITO Sofyan Zaman Sudradjat SUGENG SUDIATSO Sugiyanta Sujinah Sujinah Sukmawati, Riska Sulistiani, Ade Irma Supijatno Suryana Suwarto Suwarto Suwitono, Bayu Tri Sugiarto, Anto Trisnani Yuda Fitri Trisnani Yuda Fitri Vitria Puspitasari Rahadi Wahyu Utomo Yaqin, Roelly Ainul Yonny Koesmaryono Yosua Pratama Simangunsong Yursida Yursida Yusak, . Zarwazi, Lalu Muhamad

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